From patchwork Thu Feb 10 15:51:22 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [07/11] qed: Report error for unsupported features Date: Thu, 10 Feb 2011 05:51:22 -0000 From: Kevin Wolf X-Patchwork-Id: 82664 Message-Id: <1297353086-4844-8-git-send-email-kwolf@redhat.com> To: anthony@codemonkey.ws Cc: kwolf@redhat.com, qemu-devel@nongnu.org Instead of just returning -ENOTSUP, generate a more detailed error. Unfortunately we don't have a helpful text for features that we don't know yet, so just print the feature mask. It might be useful at least if someone asks for help. Signed-off-by: Kevin Wolf Reviewed-by: Anthony Liguori Acked-by: Stefan Hajnoczi --- block/qed.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/block/qed.c b/block/qed.c index 3273448..75ae244 100644 --- a/block/qed.c +++ b/block/qed.c @@ -14,6 +14,7 @@ #include "trace.h" #include "qed.h" +#include "qerror.h" static void qed_aio_cancel(BlockDriverAIOCB *blockacb) { @@ -311,7 +312,13 @@ static int bdrv_qed_open(BlockDriverState *bs, int flags) return -EINVAL; } if (s->header.features & ~QED_FEATURE_MASK) { - return -ENOTSUP; /* image uses unsupported feature bits */ + /* image uses unsupported feature bits */ + char buf[64]; + snprintf(buf, sizeof(buf), "%" PRIx64, + s->header.features & ~QED_FEATURE_MASK); + qerror_report(QERR_UNKNOWN_BLOCK_FORMAT_FEATURE, + bs->device_name, "QED", buf); + return -ENOTSUP; } if (!qed_is_cluster_size_valid(s->header.cluster_size)) { return -EINVAL;